BahmFit App Case Study
Cross-platform web and mobile app
Built from scratch
Germany
Ongoing development & optimization
Project Description
We partnered with Jan Bahmann, the driving force behind Bahmann Coaching, one of Germany’s leading online fitness and weight-loss programs.
Over the past years, his team has helped more than 4,000 clients lose over 71,000 kilograms through personalized coaching, sustainable nutrition plans, and mindset-based transformation. With a growing network of expert coaches, Jan’s mission is to make healthy living simple, motivating, and data-driven.
Together, we created Bahm!Fit - a web and mobile app that bridges personal coaching, nutrition tracking, and progress monitoring into one intuitive experience.The mobile app empowers clients to track their daily activity and nutrition with minimal effort. Users can log their meals by
- searching the product database,
- creating their own items,
- scanning barcodes,
- or even using an AI-powered food scanner that analyzes calories and macros from a photo.
They can also track their weight, steps, and BMI, set calorie goals, add personal notes (such as illness or other conditions), and stay connected with their coach via an integrated WhatsApp chat.
Additionally, Bahm!Fit integrates with wearables such as Apple Watch (Apple Health) and Google Fit, allowing seamless synchronization of activity and health metrics for a more complete view of clients’ progress.
The web app serves as a management tool for coaches. It allows them to monitor each client’s progress, assign personalized tasks, and review all nutrition and activity data in real time. The product database is also managed here - with an approval process for custom products and a verification system for added transparency and credibility.
Our team built Bahm!Fit entirely from scratch - from concept and UX/UI design to development, deployment, and ongoing improvements.
Over the past years, his team has helped more than 4,000 clients lose over 71,000 kilograms through personalized coaching, sustainable nutrition plans, and mindset-based transformation. With a growing network of expert coaches, Jan’s mission is to make healthy living simple, motivating, and data-driven.
Together, we created Bahm!Fit - a web and mobile app that bridges personal coaching, nutrition tracking, and progress monitoring into one intuitive experience.The mobile app empowers clients to track their daily activity and nutrition with minimal effort. Users can log their meals by
- searching the product database,
- creating their own items,
- scanning barcodes,
- or even using an AI-powered food scanner that analyzes calories and macros from a photo.
They can also track their weight, steps, and BMI, set calorie goals, add personal notes (such as illness or other conditions), and stay connected with their coach via an integrated WhatsApp chat.
Additionally, Bahm!Fit integrates with wearables such as Apple Watch (Apple Health) and Google Fit, allowing seamless synchronization of activity and health metrics for a more complete view of clients’ progress.
The web app serves as a management tool for coaches. It allows them to monitor each client’s progress, assign personalized tasks, and review all nutrition and activity data in real time. The product database is also managed here - with an approval process for custom products and a verification system for added transparency and credibility.
Our team built Bahm!Fit entirely from scratch - from concept and UX/UI design to development, deployment, and ongoing improvements.
About Client
Jan Bahmann is a renowned fitness and mindset coach based in Germany, known for his holistic approach to sustainable weight loss. His mission is to help clients achieve long-term results through smart routines and personalized approach to every client.
With Bahm!Fit, Jan aimed to scale his proven 1:1 coaching method into a digital experience — empowering clients to track their progress, stay accountable, and feel supported at every step of their transformation journey.
With Bahm!Fit, Jan aimed to scale his proven 1:1 coaching method into a digital experience — empowering clients to track their progress, stay accountable, and feel supported at every step of their transformation journey.
Challenges
- German audience & compliance: adapting UX, content, and data flows to meet the expectations of a privacy-conscious German user base.
- Highly competitive market: strong competition from established apps like Yazio and MyFitnessPal required a differentiated approach with a unique value proposition.
- Built from the ground up: no legacy systems - everything from design systems to data architecture had to be defined and implemented from scratch.
- Cross-platform performance: ensuring the same smooth experience on Android, iOS, and web, despite different device capabilities.
- Highly competitive market: strong competition from established apps like Yazio and MyFitnessPal required a differentiated approach with a unique value proposition.
- Built from the ground up: no legacy systems - everything from design systems to data architecture had to be defined and implemented from scratch.
- Cross-platform performance: ensuring the same smooth experience on Android, iOS, and web, despite different device capabilities.
/
/
/
/
/
/
/
/
/
/
Technologies
We used a modern, reliable stack to ensure performance, flexibility, and scalability across both mobile and web.
- The mobile app is built with React Native and Expo, providing a unified solution for iOS and Android - a setup that has proven its efficiency in fast development and smooth cross-platform performance.
- TypeScript ensures code reliability, while Zustand and React Query handle state management and data syncing efficiently.
- For forms and validation, React Hook Form with Yup provides a smooth, error-free user experience.
- The web app has a separate codebase tailored for desktop use, giving coaches a responsive, data-rich management interface optimized for productivity.
- On the infrastructure side, we rely on EAS Build & Submit for mobile CI/CD pipelines and Expo Updates for over-the-air app updates, enabling rapid iteration without disrupting users.
- /
This architecture has proven its robustness and scalability, supporting future feature expansions seamlessly.
Results
Bahm!Fit proves its impact early - streamlining coaching, boosting engagement, and setting the stage for scalable growth
Even in its limited release phase, Bahm!Fit already demonstrates measurable results and high potential:
Even in its limited release phase, Bahm!Fit already demonstrates measurable results and high potential:
Streamlined coaching process
coaches can manage clients, assign tasks, and monitor results in one centralized platform.
Higher engagement
features like progress tracking, AI food scanning, and daily notes encourage consistent app usage.
Smarter nutrition tracking
multiple input options — barcode, photo, quick calories — make food logging fast and intuitive.
Add:
Transparency & trust
verified and audited product data ensures accuracy and credibility for all users.
Efficient scaling
the modular architecture allows for quick implementation of new features without compromising stability.
Future-ready foundation
the infrastructure supports new integrations (e.g. wearables, advanced analytics, or in-app community features).
Add:
Transparency & trust
verified and audited product data ensures accuracy and credibility for all users.
Efficient scaling
the modular architecture allows for quick implementation of new features without compromising stability.
Future-ready foundation
the infrastructure supports new integrations (e.g. wearables, advanced analytics, or in-app community features).
/
Learnings and Future Opportunities
Key Learnings
Personalization drives engagement
users stick to the app when it adapts to their individual needs.
Building a modular
API-first architecture enabled rapid iteration and maintainability.
Add: Early testing with real clients helped refine UX decisions and validate key workflows.
Add: Early testing with real clients helped refine UX decisions and validate key workflows.
Future Opportunities
Advanced analytics dashboards for coaches
performance insights, predictive trends
Community and gamification features
group challenges, shared progress, achievements
Subscription model and marketplace for digital coaching programs
tiered pricing, premium content access
/
/
Conclusion
Together with Jan Bahmann, we built Bahm!Fit - a fitness platform that redefines the connection between coach and client to help sustainably achieve an ideal figure without prohibitions and restrictions.
Bahm!Fit unites cutting-edge technology, intuitive design, and expert coaching to deliver a powerful, data-driven fitness platform. It empowers clients to achieve their goals faster, keeps them motivated every step of the way, and gives coaches full control to manage and scale their programs — a next-generation solution ready to rival the industry’s top players.
Together with Jan Bahmann, we built Bahm!Fit - a fitness platform that redefines the connection between coach and client to help sustainably achieve an ideal figure without prohibitions and restrictions.
Bahm!Fit unites cutting-edge technology, intuitive design, and expert coaching to deliver a powerful, data-driven fitness platform. It empowers clients to achieve their goals faster, keeps them motivated every step of the way, and gives coaches full control to manage and scale their programs — a next-generation solution ready to rival the industry’s top players.
